Rappahannock Community College’s Rappahannock Institute for Lifelong Learning is offering an online class covering the critical need for sleep and the essential role it plays in brain health and functioning. The 5-session class begins Mar. 23 and incorporates the book “Why We Sleep” by Matthew Walker, Ph.D. Advance registration with a tuition payment of $35 is required and the teleconference link will be sent after registration. Go to rappahannock.edu/rill to register.